Boeing 777-200 flight crew reported being unable to raise the landing gear after takeoff.

Attributes
ACN	1517039
Time
Date	201802
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B777-200
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Unable to raise gear after takeoff. First flight after triple landing gear change. Flew aircraft in a pattern around airport and returned for an uneventful landing. Landing gear didn't work. There were no pins in the landing gear struts; verified by first officer on preflight.

Original NASA ASRS Text

Title: Boeing 777-200 flight crew reported being unable to raise the landing gear after takeoff.

Narrative: Unable to raise gear after takeoff. First flight after triple landing gear change. Flew aircraft in a pattern around airport and returned for an uneventful landing. Landing gear didn't work. There were no pins in the landing gear struts; verified by First Officer on preflight.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.